How to create a Network Node Incidence Matrix?

Hello guys, I am currently working on an IEEE paper which uses the Data of an IEEE-24 Bus System. I need to construct a Network Node Incidence Matrix (A) which consists of 21 nodes and 38 branches. I know Matlab has a function called incidence, but I am unable to figure out how to use this in order to create the Incidence Matrix. I am giving below the details of the nodes and branches.

from to
1 2 
1 3 
1 5 
2 4 
2 6 
3 9 
3 24
4 9 
5 10 
6 10 
7 8 
8 9 
8 10 
9 11 
14 1
9 12 
10 11 
10 12 
11 13 
11 14 
12 13 
12 23 
13 23 
14 16 
15 16 
15 21 
15 21 
15 24 
16 17 
16 19 
17 18 
17 22 
18 21 
18 21 
19 20 
19 20 
20 23 
20 23 
21 22

I tried to solve it using the Incidence function on matlab, but I am getting the following error: Error using matlab.internal.graph.MLGraph Duplicate edges not supported.

Error in matlab.internal.graph.constructFromEdgeList (line 125) G = underlyingCtor(double(s), double(t), totalNodes);

Error in graph (line 287) matlab.internal.graph.constructFromEdgeList(...

I am not sure where I am going wrong.

Any help would be appreciated. Thank you.

[djibeyrou ba]

please can share the code here. i have the same problem.

Answer 1

[Mukul Rao]

Hi. It seems like at some point you are creating a graph object with an edge list that has duplicate edges, for example there are two pairs of (20,23). The graph object constructor therefore complains about it.

Answer 2

[Fahad Iftikhar]

This project will help you to understand and implement the basics of Graphs and

Networks. You are given a directed graph below. Your task is to construct an

incidence matrix to tell how nodes are connected with edges. Then solve the

resultant m by m matrix n through MATLAB. Think it as an application of KCL

and KVL where the edges represent current flow direction and nodes show the

voltages.